(function () {
    document.onkeydown = function (event) {
        var e = event || window.e;
        var keyCode = e.keyCode || e.which;
        if (e.altKey && keyCode == 76) {
            if (document.getElementsByClassName('N_HNXA04')[0].style.display == "none"){
                document.getElementsByClassName('N_HNXA04')[0].style.display = "block";//douyin-header
                document.getElementsById('douyin-header').style.display = "block";
            }
            else{
                document.getElementsByClassName('N_HNXA04')[0].style.display = "none";
                document.getElementsById('douyin-header').style.display = "none";
            }
        }
    }
})();